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Bioelectrochemical acidolysis of magnesia to induce struvite crystallization for recovering phosphorus from aqueous solution

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Journal of Environmental Sciences 2019年第11期31卷 119-128页

作者： Zuobin Wang Jiao Zhang Xiao Guan Lu She Pengyu Xiang Siqing Xia Zhiqiang Zhang Key Laboratory of Yangtze River Water Environment Ministry of Education State Key Laboratory of Pollution Control and Resource ReuseCollege of Environmental Science and Engineering Tongji University Shanghai 200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 China School of Civil and Transportation Engineering Shanghai Urban Construction Vocational College Shanghai 200432 China Zhejiang Weiming Environment Protection Co. Ltd. Wenzhou 325000 China

A novel struvite crystallization method induced by bioelectrochemical acidolysis of magnesia (MgO) was investigated to recover phosphorus (P) from aqueous solution using a dual-chamber microbial electrolysis cell (DMEC).Magnesium ion (Mg2+) in the anolyte was firstly confirmed to automatically migrate from the anode chamber to the cathode chamber,and then react with ammonium (NH4+) and phosphate (PO34-) in the catholyte to form struvite.Recovery efficiency of 17.8%-60.2% was obtained with the various N/P ratios in the catholyte.When MgO (low solubility under alkali conditions) was added into the anolyte,the bioelectrochemical acidolysis of MgO naturally took place and the released Mg2+ induced struvite crystallization in the cathode chamber for P recovery likewise.Besides,there was a strong linear positive correlation between the recovery efficiency and the MgO dosage (R2 =0.935),applied voltage (R2 =0.969) and N/P ratio (R2 =0.905).Increasing the applied voltage was found to enhance the P recovery via promoting the MgO acidolysis and the released Mg2+ migration,while increasing the N/P ratio in the catholyte enhanced the P recovery via promoting the struvite crystallization.Moreover,the electrochemical performance of the system was promoted due to more stable anolyte pH and lower pH gradient between the two chambers.Current density was promoted by 10%,while the COD removal efficiency was improved from 78.2% to 91.8% in the anode chamber.

关键词： Phosphorus Struvite Microbial electrolysis cell Magnesia acidolysis Migration

Carbon isotope composition of acidolysis hydrocarbons and its application to gas-source correlation in Ordos Basin, China

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Chinese Science Bulletin 1996年第9期41卷 754-758页

作者：张同伟王先彬陈践发邵波李春园徐雁前 State Key Lab. of Gas Geochemistry Lanzhou Institute of Geology Chinese Academy of Sciences Lanzhou 730000 China Explor. Devmt. Res. Inst. C. Qingyang 745101 China

Hydrocarbons can be preserved in sedimentary deposits by absorption and includingsof diagenetic minerals during their formation from organic matter by catagenesis.acidolysis hydrocarbon is mainly composed of C1--C5 ga... 详细信息

关键词： acidolysis hydrocarbon carbon isotope gas-source correlation.

Mono-and dioleyl p-coumarate phenolipids and their antioxidant activity in a muscle food model system

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Food Production, Processing and Nutrition

Food Production, Processing and Nutrition 2022年第1期4卷 72-84页

作者： Jiankang Wang Xiaojia Hu Yan Huang Ye Zou Linxiao Han Daoying Wang Fereidoon Shahidi School of Food and Biological Engineering Shaanxi University of Science and TechnologyXi’an710021People’s Republic of China Institute of Agricultural Products Processing Jiangsu Academy of Agricultural SciencesNanjing210014People’s Republic of China Department of Biochemistry Memorial University of NewfoundlandSt.John’sNLA1C 5S7Canada

Response surface methodology (RSM) was used to optimize the degree of esterification of p-coumaric acid to triolein via lipase-catalyzed acidolysis, and enzyme load, reaction time and mole ratio of substrates were selected as variables in the experimental design. The results showed that the model employed was highly sufficient for determining the effectiveness and interaction of three selected variables, enzyme load, reaction time and the mole ratio of substrates, on the dependent variable, the degree of esterification. Although the optimization point was not found in the selected range of the three variables, the steepest ascent analysis suggested that an increase of these three variables might lead to a stationary point. However, based on the limitations on increasing the range of tested variables, including possible oxidation of synthesized lipids and increased cost, the degree of esterification so yielded in the designed central composite design should be the one closest to the possible ideal optimized degree. The p-coumarates so produced exhibited varying antioxidant performance in the tested muscle food model, which could be explained by their different lipophilicity. Moreover, the potential health benefits of synthesized phenolic lipids have been discussed.

关键词： Response surface methodology acidolysis P-coumaric acid Monooleyl p-coumarates Dioleyl p-coumarates Antioxidant activity

Recovery of Titanium from the Rich Titanium Slag by H2SO4 Method

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Journal of Materials Science & Technology 2003年第2期19卷 191-192页

作者： Zhenqi HUANG, Minghua WANG, Xinghong DU and Zhitong SUISchool of Materials and Metallurgy, Northeastern University, Shenyang 110006, China Sch. of Mat. and Metall. Northeastern Univ. Shenyang 110006 China

The blast furnace slag bearing Ti02 in Panzhihua, China, is an important resource to be utilized. In the present paper, the effects of the ratio of slag to H2S04, the reaction temperature, the particle size of the slag, and the concentration of H2S04 on the reaction rate and the acidolysis ratio of Ti were studied. The results indicated that the maximum acidolysis ratio reached 98%, which can serve as an experimental basis for the production of titania from the slag.

关键词： Slag bearing TiO2 H2SO4 acidolysis Titanium recovery

Study on a Separation and Characteristics of Hydrocarbon in a Different Occurrence Pattern within Shale

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Acta Geologica Sinica(English Edition) 2015年第A1期89卷 145-146页

作者： CAI Jingong GUO Min ZHAO Yue State Key Laboratory of Marine Geology Tongji University

As shale oil and gas are the substituted energy sources of conventional petroleum, it arouses extensive attention by many governments and oil companies in recent years.

关键词： HYDROCARBONS -- Research SHALE gas BASINS (Geology) GAS chromatography/Mass spectrometry (GC-MS) acidolysis CHINA